Anatomy & Physiology
3rd Edition
ISBN: 9781259398629
Author: McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa Stouter
Publisher: Mcgraw Hill Education,
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Chapter 12.2, Problem 5WDL
Summary Introduction
To explain:
The function of neuron structures: dendrites, axon, synaptic vesicles and neurofibrils.
Concept introduction:
A neuron is a basic functional unit of the nervous system and is the specialized cells of the nervous system that makes a complex network for the transmission of messages. A neuron is made up of a cell body, nerve fibers, dendrites, Schwann cell, and an axon
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Which of the following is the role of axonal Calcium (Ca2+) channels in neuronal communication at the synapse?
a) they inhibit the action potential causing it to stop
b) Calcium channels have no role in this process
c) by allowing calcium to exit the cell, they promote the propagation of action potential across the synapse by creating depolarization
d) by blocking calcium entrance, they mediate the contraction of presynaptic axon to facilitate movement
e) when they open, calcium enters the presynaptic terminal, promoting fusion of neurotransmitter vesicles with presynaptic membrane, and release of neurotransmitters to the synaptic cleft
Chapter 12 Solutions
Anatomy & Physiology
Ch. 12.1 - Prob. 1LOCh. 12.1 - Prob. 1WDLCh. 12.1 - Prob. 2LOCh. 12.1 - Prob. 3LOCh. 12.1 - What are the two primary functional divisions of...Ch. 12.1 - Prob. 4LOCh. 12.1 - Prob. 5LOCh. 12.2 - What are the three connective tissue wrappings in...Ch. 12.2 - Prob. 6LOCh. 12.2 - Prob. 4WDL
Ch. 12.2 - Prob. 7LOCh. 12.2 - Prob. 8LOCh. 12.2 - Prob. 5WDLCh. 12.2 - LEARNING OBJECTIVE
9. Distinguish between fast...Ch. 12.2 - Prob. 6WDLCh. 12.2 - Prob. 10LOCh. 12.2 - Prob. 11LOCh. 12.2 - Prob. 7WDLCh. 12.2 - Prob. 8WDLCh. 12.3 - Prob. 12LOCh. 12.3 - Prob. 13LOCh. 12.3 - Prob. 9WDLCh. 12.4 - Prob. 14LOCh. 12.4 - If a person has a brain tumor, is it more likely...Ch. 12.4 - Prob. 15LOCh. 12.4 - Prob. 11WDLCh. 12.4 - Prob. 12WDLCh. 12.4 - Prob. 16LOCh. 12.4 - Prob. 17LOCh. 12.4 - Prob. 13WDLCh. 12.5 - Prob. 18LOCh. 12.5 - Prob. 19LOCh. 12.5 - Prob. 14WDLCh. 12.5 - Prob. 15WDLCh. 12.6 - LEARNING OBJECTIVE
20. Distinguish between a pump...Ch. 12.6 - Prob. 16WDLCh. 12.6 - Prob. 21LOCh. 12.6 - LEARNING OBJECTIVE
22. Identify and describe the...Ch. 12.6 - Prob. 17WDLCh. 12.7 - Prob. 23LOCh. 12.7 - Prob. 18WDLCh. 12.7 - Prob. 24LOCh. 12.7 - Prob. 25LOCh. 12.7 - Prob. 26LOCh. 12.7 - Prob. 19WDLCh. 12.7 - Prob. 20WDLCh. 12.8 - Prob. 27LOCh. 12.8 - LEARNING OBJECTIVE
28. Compare and contrast the...Ch. 12.8 - Prob. 29LOCh. 12.8 - Prob. 1WDTCh. 12.8 - How are EPSP and IPSP graded potentials...Ch. 12.8 - LEARNING OBJECTIVE
30. Define summation, and...Ch. 12.8 - Prob. 22WDLCh. 12.8 - Prob. 31LOCh. 12.8 - Prob. 32LOCh. 12.8 - Prob. 33LOCh. 12.8 - How does depolarization and repolarization occur...Ch. 12.8 - Prob. 24WDLCh. 12.8 - Prob. 34LOCh. 12.8 - Prob. 35LOCh. 12.8 - Prob. 25WDLCh. 12.9 - Prob. 36LOCh. 12.9 - Prob. 26WDLCh. 12.9 - Prob. 37LOCh. 12.9 - Prob. 38LOCh. 12.9 - Prob. 27WDLCh. 12.9 - Prob. 39LOCh. 12.9 - Prob. 28WDLCh. 12.10 - Prob. 40LOCh. 12.10 - Prob. 41LOCh. 12.10 - Prob. 29WDLCh. 12.10 - LEARNING OBJECTIVE
42. Describe how acetylcholine...Ch. 12.10 - Prob. 43LOCh. 12.10 - WHAT DO YOU THINK?
2 Predict the general effect of...Ch. 12.10 - Prob. 30WDLCh. 12.10 - Prob. 44LOCh. 12.10 - Prob. 45LOCh. 12.10 - Prob. 31WDLCh. 12.11 - LEARNING OBJECTIVE
46. Identify the four different...Ch. 12.11 - Prob. 32WDLCh. 12.11 - Prob. 33WDLCh. 12 - _____ 1. The cell body of a neuron does all of the...Ch. 12 - Prob. 2DYBCh. 12 - Prob. 3DYBCh. 12 - Prob. 4DYBCh. 12 - Prob. 5DYBCh. 12 - Prob. 6DYBCh. 12 - _____ 7. An action potential is generated when...Ch. 12 - Prob. 8DYBCh. 12 - Prob. 9DYBCh. 12 - Prob. 10DYBCh. 12 - What are the four structural types of neurons? How...Ch. 12 - Prob. 12DYBCh. 12 - How does myelination differ between the CNS and...Ch. 12 - Describe the procedure by which a PNS axon may...Ch. 12 - Prob. 15DYBCh. 12 - Prob. 16DYBCh. 12 - Explain summation of EPSPs and IPSPs and the...Ch. 12 - Graph and explain the events associated with an...Ch. 12 - Prob. 19DYBCh. 12 - Prob. 20DYBCh. 12 - Prob. 1CALCh. 12 - Prob. 2CALCh. 12 - Prob. 3CALCh. 12 - Prob. 4CALCh. 12 - Sarah wants to call her new friend Julie and needs...Ch. 12 - Over a period of 6 to 9 months, Marianne began to...Ch. 12 - Prob. 2CSLCh. 12 - Prob. 3CSL
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- What are the basic components of the neuron?arrow_forwardHow does the extended length of a neuron’s processes aid its function in the body?arrow_forwardNeurons, particularly those in the brain, receive multiple excitatory and inhibitory signals. What is the name of the extension of the neuron at which such signals are received? How does the neuron integrate these signals to determine whether or not to generate an action potential?arrow_forward
- What is the role of glial cells in the brain and other parts of the nervous system?arrow_forwardWhat is a neuron? How does its structure enable it to perform its functions?arrow_forwardWhich functional segment of a neuron contains chemically gated channels? Which functional segments contain voltage-gated channels?arrow_forward
- How does the resting membrane potential of a neuron develop?arrow_forwardHow do neurotransmitters get transported within a single neuron?arrow_forwardWhat is the role of ions, the phospholipid bilayer, and plasma membrane channels in neurons relative to the concepts of current, voltage, and resistance?arrow_forward
- When a neuron is polarized,. a) both positive and negative ions are concentrated inside the neural membrane b) positive ions are concentrated outside the neural membrane while negative ions are concentrated inside the membrane negative ions are concentrated outside the neural membrane while positive ions are concentrated inside the membrane d) both positive and negative ions are concentrated outside the neural membranearrow_forwardWhen a neuron fires an action potential, closing of the voltage-gated Na+ channels helps to bring an end to _________. A) the depolarizing phase of the action potential B) the repolarizing phase of the action potential C) graded potential changes D) the resting potential E) vesicle fusion at the synapsearrow_forwardWhat is the difference in appearance and function between dendrites and axons??arrow_forward
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